Most people haven't heard of QNX Software, though they've likely come in contact with it. The real-time operating system is used where software failure can lead to catastrophic consequences, even death - from high-speed trains to air traffic control towers to highway toll systems. It's also used in more than 100 different types of cars on the road.

There really isn't much better in the real time space than QNX. We use QNX to control our automated molding machines and we have never had a probably. Only shutdown once while moved the factory. Since then 2 years plus uptime 24/7.